Google/Bing/Whatever "six kinds of atheists" and you might still find the alternet.org article about the study done at the Univ. of Tennessee.

I'm out [of the closet] to the members of my Toastmasters club and about a month ago I used the article for a speech. They all looked like they were listening and one member who's an xian told me it was one of the best speeches I've given.